(fig. 4 F, G)
Sertularia minima Thompson, 1879: 104, pl. 17 fig. 3.
Amphisbetia minima – Millard, 1975: 250, fig. 82H–K. – Vervoort & Watson, 2003: 107, fig. 20J–L.
Material examined. Stn. T21, 31.x.2007: two colonies 4–5 mm high, with female gonothecae, on algae (NHM 2009.19).
Distribution. Temperate and sub-Antarctic waters of the southern hemisphere (Vervoort & Watson 2003). This is the first record of this species for Tristan da Cunha.